Building set element



FIG. 1 is a top perspective view of the building set element design;

FIG. 2 is a bottom perspective view thereof;

FIG. 3 is a side elevational view thereof, the opposite side being identical;

FIG. 4 is a front elevational view thereof;

FIG. 5 is a rear elevational view thereof;

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a bottom elevational view thereof. 

The ornamental design for a building set element, as shown and described. 